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Haryana PMT Haryana PMT Solved Paper-2004

  • question_answer
    If the pressure of a gas contained in a vessel is increased by 0.4% when heated through 1°C, the initial temperature had been :

    A)  2500 K                                 

    B)  250 K

    C) \[250{}^\circ C\]                              

    D) \[25{}^\circ C\]

    Correct Answer: C

    Solution :

                    According to Charles law                 \[\frac{dP}{P}=\frac{dT}{T}\] Here:                     \[dT={{1}^{o}}C\] dP is change in pressures \[=0.4%\]                 \[\frac{dP}{P}=\frac{0.4}{100}\] or            \[\frac{0.4}{100}=\frac{1}{T}\] So,          \[T=\frac{100}{0.4}={{250}^{o}}C\]          


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